WO2001090028A1 - Moulage de moules en ceramique - Google Patents

Moulage de moules en ceramique Download PDF

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Publication number
WO2001090028A1
WO2001090028A1 PCT/NO2001/000219 NO0100219W WO0190028A1 WO 2001090028 A1 WO2001090028 A1 WO 2001090028A1 NO 0100219 W NO0100219 W NO 0100219W WO 0190028 A1 WO0190028 A1 WO 0190028A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
moulding
batch
tob
moulding mass
Prior art date
Application number
PCT/NO2001/000219
Other languages
English (en)
Inventor
Gard Antonsen
Pål Francis HANSEN
Original Assignee
Hiform As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hiform As filed Critical Hiform As
Priority to AU2001262810A priority Critical patent/AU2001262810A1/en
Publication of WO2001090028A1 publication Critical patent/WO2001090028A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
    • B28B13/0275—Feeding a slurry or a ceramic slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/021—Feeding the unshaped material to moulds or apparatus for producing shaped articles by fluid pressure acting directly on the material, e.g. using vacuum, air pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C1/00—Apparatus or methods for obtaining or processing clay
    • B28C1/02—Apparatus or methods for obtaining or processing clay for producing or processing clay suspensions, e.g. slip
    • B28C1/06—Processing suspensions, i.e. after mixing
    • B28C1/08—Separating suspensions, e.g. for obtaining clay, for removing stones; Cleaning clay slurries
    • B28C1/084—De-aerating

Definitions

  • the present invention relates to moulding of ceramic moulding forms, hereafter called moulds, for use in moulding of composite materials like reinforced thermoplastic, and for thermoforming and metal cast moulding.
  • CSA dry powder cement containing ceramic additives
  • CSA dry powder cement containing ceramic additives
  • Such powder cements have the property of very little volume change during solidification which may be due to low water volume loss and the wide grain size distribution giving a well filled-in packing structure.
  • the ceramic moulds thus formed are very temperature resistant and have a good structural integrity. Ceramic moulds are traditionally used for making transfer channels and coguille forms for raw aluminium or other metal bar moulding.
  • Plasma spraying is performed by mould formation by blowing a mixture of ceramic or metal powder through a flame nozzle, so-called plasma spraying, and thereby building up a ceramic or metallic layer of desired thickness against of a positive model of an object to be formed, and then removing the model, and is described in US-patents
  • Entrapped air bubbles in the mould material incurs an uneven moulding surface.
  • Such a surface is not suitable composite production of finer surfaces like interior parts for cars, thermal forming of glass, resin transfer moulding of boat hulls, and composite production using vacuumforming of commingled yarn of thermoplastic and reinforcing fibres, among several products having fine-structure surface.
  • Entrapped air bubbles also reduce the structural integrity of the mould, and gives an uneven temperature distribution of the mould and the layup during heating and cooling cycles.
  • One purpose of the invention is to make a thermally resistant mould having a desired even surface smoothnes or structure.
  • Another purpose of the invention is to make a thermally resistant mould being free of entrapped air, both internally and in the mould surface.
  • An additional purpose of the invention is to make moulds having a high wear and scratch resistance.
  • Another additional purpose is to make moulds having high thermal conductivity.
  • Another purpose of the invention is to make moulds which have a low thermal expansion coefficient .
  • Another purpose of the invention is to make a thermally resistant mould of improved surface smoothness and having a release layer.
  • Fig. 1 illustrates the process according to the invention, from the mixing of basic materials, and further treatment of the mould material through various procedures.
  • Fig. 2 in the right part of the same sheet, injecting of the liquid mould material into a mould is illustrated.
  • Fig. 3 illustrates a section of a. part of a moulding form according to the invention, illustrating supporting bars, a surface coating, and various vacuum, heating and cooling arrangements.
  • Fig. 4 illustrates a two-sided form accordinging to the invention forming a closed cavity, used in pressurized rd tn JH tn CQ r ⁇ • 0 0 ⁇ ⁇
  • a vibrator bed 12 for a mould form 11 and its plug is provided.
  • Ceramic cement powder 1 preferrably of the trade name CSA, by Elkem, or a similar cement containing ceramic additives.
  • Such powder cements have the property of very little volume change during solidification which may be due to low water volume loss and the wide grain size distribution giving a well filled-in packing structure.
  • the ceramic moulds thus formed are very temperature resistant and have a good structural integrity.
  • Reinforcing fibres 3 preferably about 4-6%, and most preferably 5% of the ceramic powder mass.
  • Water 2 preferably less than 7% by weight.
  • the exact amount of water added to the ceramic powder mass 1 to form a moulding mass 14 may be very critical in order to obtain a sufficient quality of the ceramic mould produced, both with respect to structural strength and surface smoothness .
  • the amount of water is between 5% and 6% by weight, preferrably more or equal to 5.3%, and most preferrably between 5.7% and 5.8%.
  • a water surface tension reducing agent 4 preferrably a dishwashing detergent, to an amount of about 1 drop per
  • a coating instruction for the mould release system follows. Some tools and raw materials required are listed below.
  • Oven (settings preferably at 80C, 130C and 280C) .
  • the prefabricated and heat-treated moulding form 14' is checked for dirt-spots and should be totally cleaned and degreased.
  • the oven and mould are preheated, preferably to
  • the mould 14' is then taken to a flash-off temperature at 130C, and after the flash-off taken directly to curing temperature of 280C.
  • the mould 14' is preheated to coating temperature.
  • the Xylan or other PTFE or PFA or similar has to be well shear mixed and pored into the spray- cup.
  • the mould 14' is heated to 130C with a temperature hold of 5 - 10 minutes, and then taken to cure temperature of 280C for 15 minutes. Cool the mould 14' slowly until approx. 100C and inspect release coating for failures.
  • Repair Repairing possibilities of the permanent release system are limited, but possible. Scrape away the coating on the damaged area. Grain down with very fine paper (1500) the boundary area of the defect, obtaining an even crossover. Clean the area well for debris and dust, degrease and perform the steps as indicated above. Avoid keeping the mould at cure temperature for longer time than strictly needed .
  • Fig. 3 illustrates a moulding form 14' produced according to the embodiment for moulding or forming of composite materials, glasses or metals, made by force-mixing of a batch of ceramic powder 1 and water 2, by vacuumizing the batch of moulding mass 14 in a vacuum tob 7 before injecting the batch of moulding mass 14 into a mould form 11, leaving the moulding mass 14 to harden to a rigid mould 14'; and removing the mould from the mould form 11.
  • a moulding form produced according to the invention is characterized in that a solving a small amount of a water surface tension reducing agent 4 was added to the water 2 for preparing a water solution 2. Then reinforcing fibres 3 have been added into the mixer 5 during preparation of the batch of moulding mass 14, before transfering the vacuum tob 7 to a rolling bed 7c for rotation for evacuation of entrapped air bubbles from the batch of moulding mass 14 before injection into the mould form.
  • the mould form 11 is set under vacuum at least before and preferrably during transfer of the moulding mass 14 from the tob 7.
  • internal mould channels 16 formed from pipes or wax lines (to be melted out) may be integrated in the cavity of the moulding form 11 before filling with the moulding mass 14. These channels 16 may be used for heating or cooling fluids.
  • electrical heater circuits 17 may be arranged in the moulding form 11, in order to integrate in the moulding mass 14 before hardening.
  • Internal mould reinforcement metal bars 18 and external support beams 19 may advantageously be arranged.
  • Fig. 4 illustrates production RTM injection of matrix into fiber reinforcement in the hardened form 14'.
  • a piston ejector 24 may be arranged for releasing and ejecting the moulded, hardened product, as illustrated in fig. 5, here metal moulding.
  • Fig. 6 illustrates press-moulding from a plate 31 of metal, thermoplastic, or armed composite material by using a positive shaped mould piston 26 formed in ceramite according to the invention, or made in silicon, tree, or metal arranged on a cylinder 25, against a negative (or oppositely) shaped form 14 formed according to the invention.
  • Fig. 7 illustrates thermoforming of e.g. a plate 28 of glass, plastic or similar heated by means of an infrared heating device 29 or equivalent, and formed by a piston 14' formed according to the invention.
  • Vacuum channels 30 draw the plate 28 to the desired shape on the piston form 14'.
  • fibre 4 water surface tension reducing agent, additive
  • mould forming tool (plug and/or mould form)
  • mould surface layer release means, glazing, slip surface
  • internal mould channels 16: internal mould channels
  • press cylinder 26 mould piston (for e.g. silicon, wood, metal, ceramic mass)

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Cette invention concerne un procédé de fabrication d'un moule en céramique (14') destiné par exemple au moulage ou au formage de matériaux composites, de verres ou de métaux, qui comprend les opérations suivantes: mélange à force d'un lot de poudre céramique (1) sèche dans un mélangeur (5) pour répartir uniformément les composants en poudre qui formeront une base sèche pour une masse de moulage (14), caractérisée par la lente adjonction d'une solution aqueuse (2) renfermant une faible dose d'un agent réducteur de tensions superficielles (4) dans la poudre (1) en vue de l'obtention d'une masse de moulage (4) dans le mélangeur (5) ; adjonction progressive et uniforme de fibres de renforcement (3) dans la masse de moulage (14) du mélangeur (5); transfert de la masse de moulage (14) dans une cuve à vide (7); extraction de l'air par création d'une dépression dans la cuve à vide (7) et transfert de ladite cuve (7) vers un lit roulant (7c) pour rotation et évacuation des bulles d'air prisonnières dans la masse de moulage (14); et injection de la masse de moulage (14) dans un moule (11) où on la laisse durcir et prendre la forme d'un moule (14').
PCT/NO2001/000219 2000-05-26 2001-05-25 Moulage de moules en ceramique WO2001090028A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001262810A AU2001262810A1 (en) 2000-05-26 2001-05-25 Moulding of ceramic moulding forms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20002742A NO20002742L (no) 2000-05-26 2000-05-26 Stöping av keramiske former
NO20002742 2000-05-26

Publications (1)

Publication Number Publication Date
WO2001090028A1 true WO2001090028A1 (fr) 2001-11-29

Family

ID=19911196

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2001/000219 WO2001090028A1 (fr) 2000-05-26 2001-05-25 Moulage de moules en ceramique

Country Status (3)

Country Link
AU (1) AU2001262810A1 (fr)
NO (1) NO20002742L (fr)
WO (1) WO2001090028A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009106061A2 (fr) * 2008-02-29 2009-09-03 Dorst Technologies Gmbh & Co. Kg Dispositif de coulage en barbotine sous pression et procédé de coulage d'un corps moulé
WO2015056278A1 (fr) * 2013-10-18 2015-04-23 Emery Silfurtun, Inc. Système permettant de produire des structures calorifuges pour isoler des composants générateurs de chaleur, procédé de production de celles-ci et structure calorifuge ainsi produite
WO2015119857A1 (fr) * 2014-02-04 2015-08-13 Apple Inc. Procédé de coulée d'un composant céramique
DE102014001947A1 (de) 2014-02-12 2015-08-27 Audi Ag Druckgussform und Verfahren zu dessen Herstellung
TWI581932B (zh) * 2014-12-22 2017-05-11 Stone & Resource Ind R & D Center Equipment for preparing artificial stone molded articles
CN107056333A (zh) * 2017-04-28 2017-08-18 遵义泥牛黄工艺品有限公司 陶碗的施釉方法
US9945613B2 (en) 2012-09-20 2018-04-17 Apple Inc. Heat exchangers in sapphire processing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893102A (en) * 1954-01-07 1959-07-07 William A Maxwell Article fabrication from powders
JPS61252102A (ja) * 1985-04-24 1986-11-10 日立金属株式会社 セラミツクの成形方法
JPS6268650A (ja) * 1985-09-20 1987-03-28 Toyota Motor Corp 精密鋳造用鋳型材料
DE4037258A1 (de) * 1989-11-24 1991-05-29 Asea Brown Boveri Verfahren zur herstellung eines komplizierten bauteils ausgehend von pulvern
US5238627A (en) * 1988-06-01 1993-08-24 Ngk Insulators, Ltd. Method for producing ceramics sintered article and molding method and molding apparatus to be used therefor
DE19539270A1 (de) * 1995-10-21 1997-04-24 Netzsch Erich Holding Schlickerdruckgießanlage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893102A (en) * 1954-01-07 1959-07-07 William A Maxwell Article fabrication from powders
JPS61252102A (ja) * 1985-04-24 1986-11-10 日立金属株式会社 セラミツクの成形方法
JPS6268650A (ja) * 1985-09-20 1987-03-28 Toyota Motor Corp 精密鋳造用鋳型材料
US5238627A (en) * 1988-06-01 1993-08-24 Ngk Insulators, Ltd. Method for producing ceramics sintered article and molding method and molding apparatus to be used therefor
DE4037258A1 (de) * 1989-11-24 1991-05-29 Asea Brown Boveri Verfahren zur herstellung eines komplizierten bauteils ausgehend von pulvern
DE19539270A1 (de) * 1995-10-21 1997-04-24 Netzsch Erich Holding Schlickerdruckgießanlage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198651, Derwent World Patents Index; AN 1986-336083 *
DATABASE WPI Week 198718, Derwent World Patents Index; AN 1987-126226 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009106061A2 (fr) * 2008-02-29 2009-09-03 Dorst Technologies Gmbh & Co. Kg Dispositif de coulage en barbotine sous pression et procédé de coulage d'un corps moulé
WO2009106061A3 (fr) * 2008-02-29 2010-01-07 Dorst Technologies Gmbh & Co. Kg Dispositif de coulage en barbotine sous pression et procédé de coulage d'un corps moulé
US9945613B2 (en) 2012-09-20 2018-04-17 Apple Inc. Heat exchangers in sapphire processing
WO2015056278A1 (fr) * 2013-10-18 2015-04-23 Emery Silfurtun, Inc. Système permettant de produire des structures calorifuges pour isoler des composants générateurs de chaleur, procédé de production de celles-ci et structure calorifuge ainsi produite
CN105980119A (zh) * 2014-02-04 2016-09-28 苹果公司 用于陶瓷部件铸造的方法
JP2017507051A (ja) * 2014-02-04 2017-03-16 アップル インコーポレイテッド セラミック部品キャスティングのための方法
WO2015119857A1 (fr) * 2014-02-04 2015-08-13 Apple Inc. Procédé de coulée d'un composant céramique
US10328605B2 (en) 2014-02-04 2019-06-25 Apple Inc. Ceramic component casting
DE102014001947A1 (de) 2014-02-12 2015-08-27 Audi Ag Druckgussform und Verfahren zu dessen Herstellung
DE102014001947B4 (de) 2014-02-12 2020-07-23 Audi Ag Druckgussform
EP2933077A1 (fr) * 2014-04-14 2015-10-21 Emery Silfurtun Inc Système de production de structures d'isolation de la chaleur pour l'isolation des composants de générant de la chaleur
TWI581932B (zh) * 2014-12-22 2017-05-11 Stone & Resource Ind R & D Center Equipment for preparing artificial stone molded articles
CN107056333A (zh) * 2017-04-28 2017-08-18 遵义泥牛黄工艺品有限公司 陶碗的施釉方法
CN107056333B (zh) * 2017-04-28 2020-04-21 遵义泥牛黄工艺品有限公司 陶碗的施釉方法

Also Published As

Publication number Publication date
NO20002742L (no) 2001-11-27
NO20002742D0 (no) 2000-05-26
AU2001262810A1 (en) 2001-12-03

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